Which part of a paragraph summarizes the key point?

একটি Paragraph-এ কয়েক ধরণের Sentence থাকে। সেই Sentence গুলোর নির্দিষ্ট কিছু Function থাকে।
- Topic Sentence introduces the main idea.
- (The Body) Supporting Sentences develop the key point.
- Concluding Sentence marks the end of paragraph. It also summarizes the key point.